Process of producing imitations of paintings on glass.



UNITED STATES PATENT UFFICE.

HEINRICH TITZE, OF VIENNA, AUSTRIA-HUNGARY.

PROCESS OF PRODUCING IMITATIONS OF PAINTINGS ON GLASS.

sBJEEGIFIOATION forming part of Letters latent No. 718,036,datedJ'anuary 1903- Application filed July 15, 190 1. Serial No. 68,338.(No specimens.)

Q22 all, whom it may concern:

Be it known that I, HEINRICH TITZE, a subject of the Emperor ofAustria-Hungary, residing at Vienna, Austria-Hungary, have invented anew and useful Process of Producing Imitations of Paintings on Glass, ofwhich the following is a specification.

Hitherto pictures on glass were either painted by hand or else thedrawing intended for transfer to the glass was printed with ordinarylithographic-printing ink on a suitable paper,the picture thentransferred to the glass, and varnished over. So-called diaphonouspictures were also put on the market, the nature of which consisted in adrawing printed by means of lithographic ink on transparent paper, whichpaper was then pasted on the glass and varnished over. Imitations ofpaintings on glass produced in this manner have the disadvantage offading soon, while atmospheric influences make the varnish crack,carrying with it a portion of the coloring, hence of the paper, and,finally, the pictures are easily injured while being cleaned. Thesedisadvantages are removed by thepresent process,whos'e nature consistsin the subsequent burning in of the pictures drawn on the glass bymechanical means with transparent glass-paints.

The production of the paintings on glass according to the presentprocess is as follows: To the usual lithographic varnish, in order toincrease its adhesive power, are added colophonium andVenetian turpentine,(a good proportion is one thousand parts of varnish, four hundredparts of colophonium, and one hundred parts of Venetian turpentine,)which mixture is boiled, afterward cooled off, and ground up withtransparent vitrifiable paint, such as is used for painting on glass.This mixture is laid in the usual manner on a print ing-cylinder androlled into the drawingon the stone, whereupon the paint is transferredto metachromotype paper or Englsh printing tissue-paper. The still dampimpression is powdered with dry finely-pulverized transparent paint andthe latter dusted ofi from the imprint with a fine hair-pencil,whereupon it is left to dry, and any possibly missing parts of thedrawing are replaced with the above mixture of paint. Then the imprintis cleaned with cotton or the like. In similar manner the other colorsare transferred to the paper until the whole picture on it is complete.

The glass to which the pictures are to be transferred is covered withdammar or a similar varnish diluted with turpentine, and when this ishalf-dry the paper pressed on the glass. Thereupon the glass is laidinto clean water and the paper removed, the colors of the paintremaining on the glass. The latter is now well rinsed, dried, andsubjected to the burning process in a mufiie-furnace.

In order to intensify the picture obtained, the glass plate is treatedas above described twice, or even several times, according to need, andagain burnedin the inuffle-furnace.

I claim- The herein-described process for producing imitations ofpaintings on glass consisting in preparing a design upon a lithographicstone, placing on a printing-roller a coating consisting of transparentvitrifiable paint in which has been ground a cooled mixture oflithographic varnish, colophonium and Venetian turpentine boiledtogether, rolling this coating into the design upon the stone,transferring to metachromotype paper,powdering this imprint withpulverized transparent paint, dusting off the superfluous powder,coating the glass with diluted varnish, impressing the prepared paperupon the glass when the varnish has partially dried, water-soaking thepaper off the glass, and finally rinsing, drying and burning the glassas described.

In testimonytwhereof I affix my signature in presence of two witnesses.

HEINRICH TITZE.

Witnesses:

G. B. HURT. ALvEsTo S. HOGUE.

